*{
	margin: 0; padding: 0; text-decoration: none;
}
body {
	padding: 20px;
}
h1{
	text-align: center;
}
#container {
	width: 240px;
	height: 400px;
	margin: 50px auto;
	border: 3px solid #333;
	overflow: hidden;
	position: relative;
}
#list { 
	width: 4200px;
	height: 400px;
	position: absolute;
	left: -240px;
	z-index: 1;
}
#list img {
	width: 240px;
	height: 400px;
	float: left;
}
#buttons {
	position: absolute;
	height: 10px;
	width: 100px;
	z-index: 2;
	bottom: 20px;
	left: 80px;
}
#buttons span {
	cursor: pointer;
	float: left;
	border: 1px solid #fff;
	width: 10px;
	height: 10px;
	border-radius: 50%;
	background: #333;
	margin-right: 5px;
}
#buttons .on {
	background: orangered;
}
.arrow {
	cursor: pointer;
	display: none;
	line-height: 39px;
	text-align: center;
	font-size: 36px;
	font-weight: bold;
	width: 40px;
	height: 40px;
	position: absolute;
	z-index: 2;
	top: 180px;
	background-color: RGBA(0,0,0,.3);
	color: #fff;
}
.arrow:hover {
	background-color: RGBA(0,0,0,.7);
}
#container:hover .arrow {
	display: block;
}
#prev {
	left: 5px;
}
#next {
	right: 5px;
}